Spacing device for automobile jacks



July 23, 1935. A. N. RAYMOND 3 3 SPACING DEVICE FOR AUTOMOBILE JACKS Filed Feb. 6, 1935 ARTHUR NRAY'MOND INVENTOR ATTORNEY Patented July 23, 1935 1, My application relates S-PAC'ING DEVICE JA FOR AUTOMOBILE CKS generally I to a mechanism for'rai'sing I automobiles and particularly to means of. positioningthe same at the desired 5 purpose by means of location under the axle.

I attain the particular I a centering plate, a jack and an arm connecting said plate and jack; one of the ear wheels is driven'onto the saidplate to a predeterminedpoint-thereon and asa resultthe jack will be rigidly held in the the axle; Furtherobjects and advantages will be hereinafter disclosed.

desired position under The construction details of the device are explained in the following description in conjunction with the accompanying drawing, wherein:

Fig. l is a plan view of the jack, centering plate and connecting arms.

Fig. 2 is a front elevation of the same.

Fig. 3 is a side elevation of the jack.

Fig. 4 is a side elevation of the centering plate and the arms thereon.

Fig. 5 is an enlarged view of the arms and hinges in a front elevation.

Fig. 1 illustrates the complete device attached to the jack 4.

The purpose of the plate I is to tion relative to the axle of the car.

lines 6 and I.

is shown with center The plate I Along the one side of said plate a scale 8 has beenprovided. The purpose of the said center lines and scale is to provide means whereby tioned transversely at a the jack may be posipredetermined point under the axle. This is accomplished by placing the device on the ground so that the plate is directly in front of the wheel to be removed and the center line 1 or longitudinal edge of the plate is parallel with the running board or direction of the car,

then driving the wheel to center line 1 of plate hub is directly above the be removed along the I until the center of the center line 6. In the case of a particular make of car in which the axle has been set forward of the center of the wheel hub, such distance is predetermined and an equal distance is marked ofi on the scale 8 from the center line 6 of the plate I. In such a case the car wheel is driven onto the plate I so that this mark on the scale 8 is directly below the center of the wheel hub; In the above and illustrated in is preferably employed.

nated by a simpler and wherein the arms 2 are ma construction described the drawing, the plate I The plate may be elimicheaper construction de of a single piece and bent into the shape of a' U, the base of the said U in cooperation with the arms 2 could then be emsaid plate.

of the arms 2 and 3. At

ployed to fulfill the fundamental purpose '.of .the

point I2 the arms 2 and are adapted to fit holes 10 (Fig. 3) and. bare tained therein by means of the wing nuts I4.

When the car wheel is driven on the plate I the pressure thereon is communicated through the parallel arms 2 and 3 to hold the jack firmly against the ground. However, 'in some cases where the ground is irregular below the plate the tendency of the wheel pressure on. the plate would be to raise the jack rather than hold the jack base firmly on the ground; as a matter of fact if the parallel arms 2 and 3 were constructed as one rigid piece the jack would be actually raised under similar circumstances and probably hit by the axle and displaced or injured thereby. To prevent this the linkage between the plate and jack is broken at point I2 to form two arms (2 and 3) which are pivotally connected together through hinge 5. Another feature is shown in Fig. 5 wherein it is apparent that the arms 2 and 3 may be rotated about pivot 5 in one direction only,

through an angle of of contact I2 (Fig. 5) of the arms rotation in the reverse degrees; the upper point 2 and 3 prevents direction and therefore causes arms 2 and 3 to function as a single rigid piece when pressure face of the plate I. construction described pairs of parallel arms 2 principle of is exerted on the upper sur- Although the preferential above incorporates two and 3, the fundamental the device fully applies to a construc- This is accomplished by means of the scale 9 on arms 3 (Fig. 1) similar to the method of employing the scale on the plate in locating the jack transversally under the axis of the axle as above described, the scale 9 on arms 3 (Fig. 1) are employed in positioning the jack longitudinally under the axle at a predetermined distance from the wheel. The jack 4 is then moved along the scale 9 to the desired locationand then clamped in position by the wing nuts I4. By referring to Fig. 2 the jack handle 0 onnection I5 (Fig. 2) is The plate I is connected to the jack 4 means 5 ard equipment on a car, the scale may be reduced to a single mark designating the correct position for the jack in referencertd'lthe particular make of car. When the jack is sold merely as an accessory for any make of car, achart will supplied wherein the various makes and models of cars are listed with the; proper. scale settings of the device for-each particular make.

It will be observed by referring to Fig. 2 that the -1bottom, surfacejof: the.,plate', I', the lowest -.point of; the hingei5 and the. base of the-jack 4 arezin alinement whereby the said plate; hinge and jack will all bear upon the ground. Another mfeature ofthe-lconstruction wherein thearms 2 ;';:.;are. rigidlyfastened to the upper surface of the i ixplaterlhisuto preventthe device from-tipping-as would--occur to a high degree if the'arms 2- were normally fastened to the bottom of the plate. Another -feature is thatit may be storedina small space by folding the device at point l2 by means of hinge 5.

I claim:

1. A device of the type described comprising a centering plate including means for indicating the 5 correct position of the automobile wheel on the plate where the axle may readily be positioned directly above the jack, one or more arms rigidly fastened atone end to the upper side of said plate, a jack base; means for detachably'connecting the other end of said arms to "said jack base, means whereby the position of the jack base may be reversed and means whereby such position maybe adjusted on said arms, means whereby the correct position of the jack base on said arms can be determined, each arm comprising two parts,

and pivotal means for linking the two parts of eacharm together-whereby the jack base will a1- ways-,-rest firmly on the ground and never be raised by the wheel pressure on the plate.

-2.'A- de'vice-= of the type described comprising a, centering- :plate, one-r more arms" rigidly-fastened 'atone end-"to -said plate-and deta'chably connected" to -a'-' jack baseat the-other -end,-- ea'ch arm comprising two parts; and means-for l-in-king the twoparts of --ea'ch arm together whereby the jack-base '-'a .l i est firmly on the ground and neverrberaised by gwheer sure onthe plate.

A13 ]:HUB Ni RAYMOND. 

